we have been using this product for more than 2 years as of now.
Our friends told us about this, my kids developed lotof resisitance to common colds and coughs and general health.
They used to suffer with lot of colds , coughs seasonal allergies.
But we need to use this contineoulsy for 6 + months if not more and after that a weekly 2 doses. It wont hurt to use daily though.